a smile from kerry kennedy and her family. she was found not guilty of driving while impaired. of knowingly driving under the influence of a sleep aid. members of the kennedy family supported her in court all week. and today, the daughter of robert kennedy had a message for them. >> i want to thank my family and my friends, my mother, ethel kennedy, and my daughters. i'm just very, very grateful that justice was done. >> and by the way, that verdict was unanimous. >>> and also tonight, new tapes putting new heat on new jersey governor chris christie, all because of that traffic jam on the george washington bridge orchestrated by members of his inner circle. for the first time we're going to be able to take you there at the moment it was happening -- as frustrated, frantic people were calling for help. abc's senior national correspondent jim avila with the headline tonight. >> the gw bridge is totally gridlocked. >> stay out of the center of town. >> reporter: 911 tapes released today takes us inside the chaos that was fort lee, new jersey. when top aides of the governor jammed